This is great. You can learn so much by designing an experiment. If you truly want to compare fixed versus pinned your pin should be at right angles to the side with the smallest I. Your brackets are not allowing the end of the pinned joint to rotate freely. Furthermore the fixed setup should clamp tightly on the end of the column (for the best results).
Hey, interesting experiment & cool to see some tests in different materials that aren’t at many kN load! I know this video is 4 years old, but for anyone else who stumbles across it, there is a point that was missed: You said the material in the last two tests should have failed in the direction that the pins allow - but it is important that the moment of inertia is totally different in that axis, and much higher. So while the fixed-pinned failure would be at a power load in that axis, it’s still many times times higher than the other axis that acts as fixed-fixed.
This is great. You can learn so much by designing an experiment. If you truly want to compare fixed versus pinned your pin should be at right angles to the side with the smallest I. Your brackets are not allowing the end of the pinned joint to rotate freely. Furthermore the fixed setup should clamp tightly on the end of the column (for the best results).
Hey, interesting experiment & cool to see some tests in different materials that aren’t at many kN load!
I know this video is 4 years old, but for anyone else who stumbles across it, there is a point that was missed:
You said the material in the last two tests should have failed in the direction that the pins allow - but it is important that the moment of inertia is totally different in that axis, and much higher.
So while the fixed-pinned failure would be at a power load in that axis, it’s still many times times higher than the other axis that acts as fixed-fixed.
I can't stop being curious about the material actually.
The pinned ends should be able to rotate freely. Therefore, you should better place the column top end in to a V shaped groove.
What material is used instead of steel in this video
This is a cool video! Nice job!
Thanks, this video fed my curiousssssity!
what is the specimen young's modulus is it standard or you calculate by some sensor my project is attaching sensor on buckling failure setup
excelent . but the sound volume of video is very slow
Pinning axis is wrong
Pinned end can be rotate along possible deformation direction, not the other direction. All of configurations are fixed-fixed.
Nicely explained
Thanks
So less voice!